Sandpaper roll and protector therefor



May 17, 1938. c. A. ROSS SANDPAPER ROLL AND PROTECTOR THEREFOR Filed May26, 1936 Fig? 2 guwc/wtow C'UL //v A Fuss Patented May 11, 1938 UNITEDSTATES PATENT OFFICE 2,117,995 SANDPAPER ROLL AND PROTECTOR THEREFORApplication May 26,

1 Claim The invention relates to protectors and with regard 'to its morespecific features to protectors for rolls of sandpaper.

One object of the invention is to provide a 5 protector that shallprevent the damaging of. a

roll of sandpaper. Another object of the invention is to provide aprotector that can readily be manufactured at small'expense. Anotherobject of the invention is to facilitate packing of rolls of sandpaper.Another object of the invention is to provide a roll of sandpaper andprotectors therefor which can be stood on end without damage. Anotherobject of the invention is positively to protect the edge of a sandpaperroll. Another object of the invention is to provide a construction forprotectors according to which' protectors of different diameters canquickly be made up. Other objects will be in part obvious or in partpointed out hereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangements of parts, as will beexemplified in the structure to be hereinafter described and the scopeof the application of which will be indicated in the following claim.

In the accompanying drawing, in which is shown one of various possibleembodiments of the mechanical features of. this invention,

Figure l is a plan view of the protector,

Figure 2 is an axial sectional view of a roll of sandpaper with aprotector at each end, and

Figure 3 is a perspective view of a package constructed according to theinvention and ready for shipping. 1

Edge damage to a roll of sandpaper is the most serious problem of themanufacture of sandpaper ed, the railway or truck employees will usuallystand the sandpaper rolls on end. In doing so they are apt to drop therolls and as they usually do not take care to set them down perfectlystraight, the blow received at the edge of the roll causes deformationof a few of. the outsidelayers of v the abrasive material, producing acrescent l0 shaped cracking. This cracked edge weakens an.

abrasive drum, cover or belt which is made from the affected portion ofthe sandpaper. For these and 'other reasons, edge damage due to shippingis a serious matter to the manufacturer of sandpaper and also abrasivecloth.

E i ii F a 1986, Serial No. 81,880 w M (01. 206-59) JUL i340 I provide alarge sheet of corrugated paper board. Preferably I coat one edge of theboard parallel to the corrugations with adhesive, for example sodiumsilicate or glue. I now, and before the adhesive has completely set,place this edge of the corrugated paper board upon a mandrel and thenwind the board.

When a. cylinder of spirally wound corrugated board has thus beenproduced, I secure the free end with gummed paper. I remove the mandreland I may now out disks from the cylinder with a rotary saw or by meansof gang saws.

Referring now to the drawing, the numeral Ill designates a protectordisk of spirally coiled corrugated paper board, for example of the orderof l to 2" in thickness. I may make a disk of any diameter less than thediameter of the wound cylinder from which the disks were cut, merely bybreaking the paper seal and unwinding convolutions of the corrugatedpaper board, cutting, and resealing with a gummed strip of paper. I

There is provided a coiled spirally wound roll of sandpaper II which isto be shipped. Referring now to Figure 2, in order not to crush thefirst convolution of the sandpaper an axial hole i2 exists in the insideof the sandpaper roll. I now place a protector disk ill at either end ofthe roll II and wrap the entire assembly in wrapping paper it, forexample kraft paper, sealing the wrapping along an element of thecylindrical roll H with gummed paper tape I5 and folding the paper overeach disk l0, sealing with gummed circular paper heads It.

If desired, I may include a long wooden rod I! in the construction,placing it in the hole I! with its opposite ends-"in correspondingcentral holes I! of. the disk Ill. However, in many cases the rod I1 maybe omitted or I may substitute short wooden plugs projecting only ashort distance into the hole I! and, if desired, secured in the holes llwith adhesive, for example glue.

In handling the completed package of the present invention, when it iscarelessly thrown into position in the freight car or other vehicle,being allowed to drop with its axis at an acute angle to the vertical,the corrugated board protectors III are or may be slightly crushed butat all events receive the shock and because they are non-rigid and alsodeformable, do not transmit the shock to the sandpaper roll I l tosuchan extent as to result in causing the damage here t'ofore explained:Therefore, the entire package arrives at its ultimate destinationwithout edge damage and in good condition.

The purpose of applying adhesive to the first convolution at the hole Itis to permit the forming of a convolution to be received by the mandreland otherwise to assist in the manufacture of. the article. This stepand feature may be omitted, if desired.

The protector disk of the invention is easy to manufacture and its sizecan be readily changed as explained. Furthermore, the material fromwhich it is constructed is cheap. The entire package can be assembled bypackers very quickly and the package is a neat package which is easy tohandle and presents an excellent appearance.

It will thus be seen that there has been provided by this invention anarticle in which the various objects hereinabove set forth together withmany a thoroughly practical advantages are successfully achieved. Asmany possible embodiments may be made of the above invention and as manychanges might be made in the embodiment above set forth, it is to beunderstood that all matter hereinbefore set forth or shown in theaccompanying drawing is to be interpreted as illustrative and not in alimiting sense.

I claim:-- A package comprising a cylindrical roll of.

coated abrasive sheet material, a protective device at an end of thesaid roll and in juxtaposition thereto, said protective devicecomprising corrugated board spirally wound and in disk shape, the axisof the spiral being the same as the axis of the roll, and wrapping paperwrapped around the roll and over the protective device thus securing theprotective device to the end of the roll. i

COLIN A. R088.

